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Alphacool NexXxoS XT45 copper radiator 400mm 2x200mm 45mm thick G1/4 ports

Alphacool

Alphacool NexXxoS XT45 Full Copper 400mm Radiator 2x200mm 45mm 14350

SKU CH-629Z-9WQEF

A 400 mm full-copper radiator with 12 FPI fin density and seven G1/4 ports for dual 200 mm fan mounting

  • Radiator size400 mm
  • Product typeRadiator
  • Full copper construction delivers 400 W/(mK) thermal conductivity
  • 12 FPI fin density allows high airflow with low fan pressure
  • Serrated cooling fins increase air turbulence for better heat dissipation
  • 400 mm length with dual 200 mm fan mounts maximises cooling surface
  • Seven G1/4 ports give flexible loop routing options

Alphacool NexXxoS XT45 400mm Copper Radiator

This 400mm radiator is built entirely from copper, including the end chambers, water channels and cooling fins. It is designed for custom water-cooling loops that demand high thermal conductivity and a large surface area. The unit measures 440mm long, 200mm wide and 48mm thick. It accepts 200mm fans and provides seven G1/4 threads for loop connections.

Suited for large-loop builders.

The radiator suits enthusiasts building high-capacity loops who can accommodate a 440mm length and 48mm depth. It is not for builders restricted to shorter radiator lengths or thinner profiles. It is not for loops that require aluminium construction or smaller fan mounts. The 12 FPI fin density works well with low-speed 200mm fans.

45mm core thickness with 12 FPI fin density

The single specification that decides fitment is the 45mm core thickness, which yields an overall 48mm depth including end tanks. This dimension determines whether the radiator clears motherboard components, case panels and fan mounts in your chassis. Verify the available space before purchase.

How it compares

Measured against everything we stock in Liquid Cooling & AIO Coolers, at today’s prices. Recalculated every night.

Price $134.99
Pricier than about 77% of the 1,190 comparable items (median $71.99).
Radiator size 400 mm
Higher than about 90% of the 165 comparable items (median 360 mm).

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Specifications

Product
Product typeRadiator
Size & build
Radiator size400 mm

Questions about this item

Will the 440 mm length and 45 mm thickness fit alongside my existing 200 mm fans in the same loop?

The radiator measures 440 mm long, 200 mm wide and 48 mm tall, so it aligns with standard 200 mm fan mounts and leaves room for tubing runs to other components.

How can I confirm the 12 FPI copper core is flowing correctly after installation?

With the pump running, feel for even warmth across the 400 mm fin stack and watch for a steady coolant temperature drop under load, which shows the 12 FPI copper channels are circulating properly.

Does the box include seven G1/4 plugs for the seven ports, or must I buy them separately?

The radiator has seven G1/4 threads ready for fittings; plugs and fittings are not included and must be purchased separately.

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